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24C02 参数 Datasheet PDF下载

24C02图片预览
型号: 24C02
PDF下载: 下载PDF文件 查看货源
内容描述: SERIAL 2K ( 256 ×8 ) EEPROM [SERIAL 2K (256 x 8) EEPROM]
分类和应用: 可编程只读存储器电动程控只读存储器电可擦编程只读存储器
文件页数/大小: 16 页 / 147 K
品牌: STMICROELECTRONICS [ ST ]
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ST24/25C02, ST24C02R, ST24/25W02  
Figure 6. I2C Bus Protocol  
SCL  
SDA  
START  
SDA  
SDA  
STOP  
CONDITION  
INPUT CHANGE  
CONDITION  
1
2
3
7
8
9
SCL  
SDA  
ACK  
MSB  
START  
CONDITION  
1
2
3
7
8
9
SCL  
SDA  
MSB  
ACK  
STOP  
CONDITION  
AI00792  
Write Operations  
For the ST24/25W02 versions, any write command  
with WC = 1 will not modify the memory content.  
The Multibyte Write mode (only available on the  
ST24/25C02 and ST24C02R versions) is selected  
when the MODE pin is at VIH and the Page Write  
mode whenMODEpin isat VIL. The MODEpinmay  
be driven dynamically with CMOS input levels.  
Byte Write. In the Byte Write mode the master  
sends one data byte, which isacknowledged by the  
memory. The master then terminates the transfer  
by generating a STOP condition. The Write mode  
is independant of the state of the MODE pin which  
could be left floating if only this mode was to be  
used. However it is not a recommended operating  
mode, as this pin has to be connected to either VIH  
or VIL, to minimize the stand-by current.  
Following a START condition the master sends a  
device select code with the RW bit reset to ’0’. The  
memory acknowledges this and waits for a byte  
address. The byte address of 8 bits provides ac-  
cess to 256 bytes of the memory. After receipt of  
the byte address the device again responds with  
an acknowledge.  
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